A cobalt-pyrrole coordination compound as high performance cathode catalyst for direct borohydride fuel cells

被引:17
作者
Chen, Yuehan [1 ,2 ]
Wang, Shuping [1 ,2 ]
Li, Zhoupeng [1 ,2 ]
机构
[1] Zhejiang Univ, Zhejiang Prov Key Lab Adv Chem Engn Manufacture T, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China
基金
中国国家自然科学基金;
关键词
OXYGEN REDUCTION REACTION; MESOPOROUS CARBON; METAL CATALYST; NITROGEN; ELECTROCATALYSTS; FABRICATION; ADSORPTION; OXIDATION; OXIDES; ACID;
D O I
10.1039/d0ra05143h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Pyrrole and cobalt nitrate were used as nitrogen and metal sources respectively to synthesize a dinitratobis(polypyrrole)cobalt(ii) (Co(polypyrrole)(2)(NO3)(2)) adduct as the precursor of a Co-pyrrole/MPC catalyst. Pyrrole has the capability of polymerization and coordination with Co(ii). Taking this advantage, the Co(polypyrrole)(2)(NO3)(2)coordination can form a long-chain structure with abundant and robust Co-N bonds, contributing to significantly increased catalytic sites in the product catalyst. As a result, the obtained Co-pyrrole/MPC (MPC = macroporous carbon) catalyst exhibited high ORR catalytic activity in alkaline media and excellent performance in direct borohydride fuel cell (DBFC). A peak power density up to 325 mW cm(-2)was achieved at ambient condition, outperforming the commercialized Pt/XC-72 benchmark containing 28.6 wt% Pt. The construction of long-chain coordination precursor was verified playing a key role in the electrochemical improvement of Co-pyrrole/MPC catalyst in DBFC.
引用
收藏
页码:29119 / 29127
页数:9
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